/*
 * Copyright 2016 miguelbcr
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.miguelbcr.io.rx_gps_service.lib;

import rx.Observable;

class GetTripSpeed {
  private float speed;
  private long time, distance;
  private float discardSpeedsAbove;

  GetTripSpeed() {
  }

  void setParams(long distance, long time, long fastestInterval, float discardSpeedsAbove) {
    this.distance = distance;
    this.time = time < fastestInterval ? fastestInterval : time;
    this.discardSpeedsAbove = discardSpeedsAbove;
  }

  long getLastTimeElapsed() {
    return time;
  }

  float getSpeed() {
    return speed;
  }

  Observable<Float> builtObservable() {
    speed = time == 0 ? 0 : 1f * distance / time;

    if (discardSpeedsAbove > 0 && speed > discardSpeedsAbove) speed = 0;

    return Observable.just(speed);
  }
}
